Identification of 3d–4p transitions in Co-like W xlvii and Tm xliii and in Cu-like W xlvi and Tm xli from laser-produced plasmas

Abstract
We observed and identified 3d-4p transitions in Co-like (3d9-3d84p) and Cu-like (3d104s-3d94s4p, 3d104p-3d94p2, 3d104d-3d94p4d, 3d104f-3d94p4f) x-ray spectra of W XLVIII and W XLVI (~6–7.5 Å) and of Tm XLIII and Tm XLI (8–9 Å). The spectra were obtained by irradiating planar targets with high-intensity laser light. Identification was based on isoelectronic sequence analysis and on comparison with ab initio relativistic calculations. The importance of configuration interactions in Cu-like spectra is pointed out. Agreement between computations and measurements was good.